One can derive (REF )-(REF ) in different ways, in particular [1]}, starting from the relation
\(\langle \prod _{b=1}^\textsc {f}\frac{\mathbf {p}_{\mu ^b}(W^*_b(\textsc {Z}))}{|\texttt {Aut}(\mu ^b)|} \rangle =\sum _{\nu ^1,\dots ,\nu ^\textsc {v}} {\cal {H}}_\Omega \left(\mu ^1,\dots ,\mu ^\textsc {f},\nu ^1,\dots ,\nu ^\textsc {v}\right)\prod _{a=1}^\textsc {v}\mathbf {p}_{\nu ^a}(W_a(\textsc {I}))\) 
